package com.jbit.springboot_redis.redis;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.parser.ParserConfig;
import com.alibaba.fastjson.serializer.SerializerFeature;
import org.springframework.data.redis.serializer.RedisSerializer;
import org.springframework.data.redis.serializer.SerializationException;

import java.nio.charset.Charset;

/**
 * @Description: 自定义序列化
 */
public class FastJson2JsonRedisSerializer<T> implements RedisSerializer<T> {

  public static final Charset DEFAULT_CHARSET = Charset.forName("UTF-8");

  private Class<T> clazz;

  public FastJson2JsonRedisSerializer(Class<T> clazz) {
    super(); this.clazz = clazz;
  }
  //redis在写入对象时,自动进行json转换,同时在json转换的同步,加入该对象的全限名,同时json的字符格式为utf-8
  @Override
  public byte[] serialize(T t) throws SerializationException {
    if (t == null) {
      return new byte[0];
    }
    return JSON.toJSONString(t, SerializerFeature.WriteClassName).getBytes(DEFAULT_CHARSET);
  }
  //开启白名单操作
  @Override
  public T deserialize(byte[] bytes) throws SerializationException {
    if (bytes == null || bytes.length <= 0) {
      return null;
    }
    //添加白名单
    ParserConfig.getGlobalInstance().addAccept("com.jbit.springboot_redis.entity");
    String str = new String(bytes, DEFAULT_CHARSET);
    return (T) JSON.parseObject(str, clazz);
  }
}
